Markham Wills & Probate Lawyer, Ontario, page 6

To deliberately prevent someone from inheriting something. This is usually done by a provision in a will stating that someone who would ordinarily inherit property -- a close family member, for example -- should not receive it. In most states, you cannot completely disinherit your spouse; a surviving spouse has the right to claim a portion (usually one-third to one-half) of the deceased spouse's estate. With a few exceptions, however, you can expressly disinherit children.

A trust designed to save on estate tax. The trust principal is preserved for the trust maker's grandchildren, with his or her children receiving only income from the trust. Because the children (the middle generation) never legally own the property, it isn't subject to estate tax at their death. See generation-skipping transfer tax.

A surviving spouse's right to receive a set portion of the deceased spouse's estate -- usually one-third to one-half. Dower (not to be confused with a 'dowry') refers to the portion to which a surviving wife is entitled, while curtesy refers to what a man may claim. Until recently, these amounts differed in a number of states. However, because discrimination on the basis of sex is now illegal in most cases, most states have abolished dower and curtesy and generally provide the same benefits regardless of sex -- and this amount is often known simply as the statutory share. Under certain circumstances, a living spouse may not be able to sell or convey property that is subject to the other spouse's dower and curtesy or statutory share rights.

Latin for 'the body' of the trust. This term refers to all the property transferred to a trust. For example, if a trust is established (funded) with $250,000, that money is the corpus. Sometimes the trust corpus is known as the 'res,' a Latin word meaning 'thing.'

A trust that allows couples to reduce or avoid estate taxes. Each spouse puts his or her property in an AB trust. When the first spouse dies, his or her half of the property goes to the beneficiaries named in the trust -- commonly, the grown children of the couple -- with the crucial condition that the surviving spouse has the right to use the property for life and is entitled to any income it generates. The surviving spouse may even be allowed to spend principal in certain circumstances. When the surviving spouse dies, the property passes to the trust beneficiaries. It is not considered part of the second spouse's estate for estate tax purposes. Using this kind of trust keeps the second spouse's taxable estate half the size it would be if the property were left directly to the spouse. This type of trust is also known as a bypass or credit shelter trust.